kirby



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l KNOB ATTACHMENT. No. 281,701. ,ci Patented July 24, 1888.

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J. KIRBY, Jr. y

y KNOB ATTACHMENT.

NO. 281,701. Patenten July '24, l188s.

' UNITED v STATES 'PATENT QFFICE.

JOHN KIRBY, Jn'. or LUDLOw, KENTUCKY, AssiGNOR rro rosr a oO.

4KNOB ATTACHNI ENT.

SPECIFICATION forming part of Letters Patent No. 281,701, dated July 24, 1883.

' Application filed oetobericisse. (Modem To all whom it may concern/.-

Be it known that l, JOHN KIRBY, Jr., of Ludlow, Kenton` county, and State of Kentucky, have invented certain new and useful Improvements in Knob Attachments, of which the following is a full, clear, and -eXact specification, reference being had to the accompaing drawings, in which- Figure 1 is a horizontal section of lock in position. Fig. 2 is avertical section through line a: x, Fig. l, showing latch out. Fig. 3 is a vertical section through line x. x, Fig. 1, showing latch withdrawn. Fig. l is a perspective view of knob-shank. Fig. 5 is a view of knob g. Fig. 6 is a view of sleeve. Fig. 7 is a view of the coupling-nut. view of pin or bolt with spring. Y

Similar letters of reference in theseveral drawings denote the same parts.

My invention relates to looks for doors, more especially for lthe doors of railroad-cars; and it consists, rst, in making a look in which the movement ofthe outside knob is independent of the rosette 5 second, in-providing a more substantial manner ofattaching knobs to doors..

Heretofore it has been customary, in constructing door-locks, to connect the outside knob and the rosette together, the bearing for the knob being made in the rosette, and the two knobs being connected by means of a spindle.

It has been found troublesome to iit a lock ofthe usual description to the doors, because, unless the spindle be perfectly straight and trueand the surface of the rosette true with the face of the lock-rim of the lock, the lock will stick and bind. The same difficulty in f1tting the lock to place arises from any unevenness in the door itself.-

It will be seen by the drawings that `in my lock the outside and inside knobs are connected, and are independent of the rosette, the rosette being used for a inish only. A

My lock is constructed and fitted to a door as follows: A suitable hole is bored through a door, A. Back plate, R, having a boss, c, is placed against the door with the boss inserted in the hole. This boss ce has a screw-thread cut on the inside. The lock-case B is then placed in position. IThis case B is perforated with a hole suitable for the insertion of `the Fig. 8 is a.

sleeve D and shank E, andhas a screw-thread, e, cut on the interior face of said hole. Sleeve D is "now inserted. This sleeve D is tubular, has avflange, d, on its exterior side, which, when sleeve D is in position, rests upon the lock-case B. Beyond this flange the neck has a screwthread cut on it on its outside. lt has also a screw-thread-cut on its inside above the line of the flange, i and is cut away on one side for for a short space, at S, Figs. 6 and l, to allow of the placing of thehooked end of latch-lever. This sleeve screws through the back plate, R, and also into a screw-threaded bushing, F. The bushing F is tubular, screw-threaded on the ins/ide, and is flanged, and when in position the ange is pressed up on the surface of the door. y doors, the lock-plate B, case B, sleeve D, and shank E are united by the means described.

To attach the lock to the door, the bushing F is inserted in the hole on the opposite side and screwed onto sleeve D. The shank E is inserted into the sleeve D. This shank E is' by preference a projection from lower half of knob g', and -is a part of the same casting. Near the knob g the shank on its outside is screwthreaded, and whenV inserted is screwed into sleeve D, but not so firmly: as to interfere with the turning of the knob. It is cut away at h, (see Fig. 4,) to accommodate the insertion of the end K of latch-lever H. lt is also screwthreaded for a part of its length where it passes through the other surface of the door. Beyond the threaded part it is reduced in diameter and lsquared. This square part is de- Vhen readyto be applied to signed to be inserted in the' opposite knob, g,

being provided with a pin or lug, e', fitting a groove, g, in the morti'se of the shank of the outer knob. The rosette K is thenplaced in position and attached by screws. A couplingnut, L, is now passed over the square end of shank E and screwed to the shank. Knob g IOO To prevent the loosening of the parts, there is a hole, 11, in the flange of coupling-nut L, into which aspring bolt or pin, M, in knob f/ engages when knob g vis screwed home.

The shank E is cut away in that portion of its length which is between the case B and back plate, R, to permit of the placing of the hooked end K of the latch-lever H in position to be moved back by the full portion of the shank E when the knob is turned, and thus withdraw the latch. Latch N is returned to its irst or locking position by spring I), or by spiral spring P', as may be desired.

An advantage arising from the construction of my lock is that a blow on the inside knob cannot easily destroy the lock, because, the sleeve D being screwed through both the back plate and case, the case is strongly braced against an outside pressure or impact such as the knobs of car-doors are subject to.

I am aware that shanks have before been made to extend through the lock and back plate, and that they have been cut away to operate the latch-lever without the aid of a follower; and I do not claim, broadly, a lock having a shank made in this manner.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is as follows:

l. In a door-lock, the combination of a sleeve extending entirely through the easing and door, having a neck on the outside of the casing and the rear end screw-threaded on the outside, a bushing to receive the rear end of the sleeve, and a shank extending entirely through the sleeve, having a spindled proj ection at its rear end to receive a knob, independent of the rosette, as set forth.

2. In a doorlock, the combination of a sleeve extending entirely through the casing and door, having a neck on the outside of the casing, the rear end screw-threaded on the outside, a bushing fitting on the rear end of the sleeve, a shank extending entirely through the sleeve, having a screw-threaded rear end and spindled projection, a knob having a screw-threaded shank fitting the spindle, and a nut securing the two shanks together, as set forth.

3. In a door-lock, the combination of a sleeve extending entirely through the casing and door, having a neck on the outside of the casing, and screw-threaded on the outside at its rear end, a bushing fitting the rear end of the sleeve, a shank extending entirely through the sleeve/having a screwthreaded rear end with spindled projection, a knob having a screw-threaded shank fitting the spindle, a nut securing the two Shanks together, having a perforated flange, and a spring-bolt in the outer knob engaging with the perforation in the nut-flange, as set forth.

4. In a door-lock, the combination of casing B, back plate, R, bushing F, the sleeve D, having flange d, and screw-threaded through the casing, the back plate, and into the bushing, shank E, extending through the'sleeve, and having screw-threaded rear end provided with spindled projection, andA the outer screwthreaded shank secured to the inner shank by adjustable nut L, as set forth.

5. In a door-lock, the combination of inner knob having shank screw-threaded at its rear end, a spindled projection from its rear end, having a pin or lug on one side, an outer knob having a screw-threaded shank longitudinally mortised, and a groove on one side of the mortise to receive the pin or lug on the spindled projection, and a nut securing the two shanks together, as set forth.

The foregoing speciiication of my invention signed by me this 13th day of October, A. D. 1882.

JOHN KIRBY, JR.

VitnesSeS:

JEPTHA GARRARD, Josnrn Cox, Jr. 

